derivedDataType tspDate

This type represents a timestamp containing only years, months and days in the following format: yyyy-mm-dd. The length of the datas can be sorter, if needed. (leading zeros are not mandatory).

stringtspDate

Valid values: [0-9]{1,4}-(1[0-2]|0?[0-9])-(3[0-1]|[0-2]?[0-9])
  derivedDataType tspDate